从oralce中读取blob多图，只显示一张图的问题

[code="java"]<%@ page language="java" pageEncoding="UTF-8" contentType="image/jpeg" import="java.awt.image.*,java.sql.*,com.sun.image.codec.jpeg.*,java.util.*,javax.imageio.*,java.io.*"%>

<%

Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
conn=sql.getConnection();
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);  

BufferedInputStream inputimage=null;
boolean defaultCommit = conn.getAutoCommit();
conn.setAutoCommit(false);
try
{
int i=0;
rs = stmt.executeQuery(" SELECT Pic from V_USER WHERE USER='MAX'");

while (rs.next())
{
i++;
oracle.sql.BLOB blob = (oracle.sql.BLOB)rs.getBlob("Pic");
inputimage = new BufferedInputStream(blob.getBinaryStream());
}rs.close();
}
catch (Exception ex)
{
System.out.println("blobRead()'s exception"+ex);
conn.rollback();
throw ex;
}
conn.setAutoCommit(defaultCommit);
// Send back image
BufferedImage image = null;
try
{
image = ImageIO.read(inputimage);
}
catch(IOException e)
{
System.out.println(e);
}
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
inputimage.close();
%> [/code]

SELECT Pic from V_USER WHERE USER='MAX' 的值有多笔资料，
在页面上显示时，只显示最后一张图，请问是何原因啊！！

问题1：
你是通过jsp页面输出图像的，因此一个页面仅能输出一个图片；

问题2：
如下语句 将从oracle获取最后一个blob数据给inputimage，因此只输出最后一次的数据
while (rs.next())

{

i++;

oracle.sql.BLOB blob = (oracle.sql.BLOB)rs.getBlob("Pic");

inputimage = new BufferedInputStream(blob.getBinaryStream());

}rs.close();

}

解决方案：

1、在要显示图片的网页使用:
for 图片id 图片idList {

}

2、请求JSP时带上图片的id
如?id=123

3、jsp根据id查一个图片写出

//原因是：while循环重复给一个 inputimage 赋值导致，在循环到下一条记录会把上一条记录覆盖的原因
//解决方法：用集合保存
[code="html"]
<%@ page language="java" pageEncoding="UTF-8" contentType="image/jpeg" import="java.awt.image.*,java.sql.*,com.sun.image.codec.jpeg.*,java.util.*,javax.imageio.*,java.io.*"%>

<%

Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
conn=sql.getConnection();
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);  

BufferedInputStream inputimage=null;
boolean defaultCommit = conn.getAutoCommit();
conn.setAutoCommit(false);
ArrayList imagestList=new ArrayList();

ArrayList imageList=new ArrayList();
try
{
int i=0;
rs = stmt.executeQuery(" SELECT Pic from V_USER WHERE USER='MAX'");

while (rs.next())
{
i++;
oracle.sql.BLOB blob = (oracle.sql.BLOB)rs.getBlob("Pic");
inputimage = new BufferedInputStream(blob.getBinaryStream());
//原因是：while循环重复给一个 inputimage 赋值导致，在循环到下一条记录会把上一条记录覆盖的原因
//解决方法：用集合保存
imagestList.add(inputimage);
}rs.close();
}
catch (Exception ex)
{
System.out.println("blobRead()'s exception"+ex);
conn.rollback();
throw ex;
}
conn.setAutoCommit(defaultCommit);
// Send back image
BufferedImage image = null;
try
{
for(int i=0;i<imagestList.size();i++)
{
image = ImageIO.read(inputimage);
imageList.add(image);//存放所有图片
}

}
catch(IOException e)
{
System.out.println(e);
}
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
inputimage.close();
%>

[/code]